Air circuit breaker



FIG. 1 is a perspective view of an air circuit breaker showing the new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof based on FIG. 2;

FIG. 4 is a left-side elevation view thereof based on FIG. 2;

FIG. 5 is a right-side elevation view thereof based on FIG. 2;

FIG. 6 is a top plan view thereof based on FIG. 2;

FIG. 7 is a bottom plan view thereof based on FIG. 2; and,

FIG. 8 is another perspective view showing a state of use thereof.

The broken line portion of the figure drawings is included to show portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for an air circuit breaker, as shown and described herein. 